问题:
A . It is inflated by a small CO2 bottle that is automatically tripped when the front zipper is at the top of the zipper track
B . It is inflated by a small CO2 bottle that is manually tripped
C . It is inflated by blowing through an inflation tube
D . It inflates by sea water bleeding into the flotation bladder and reacting with a chemical therei
● 参考解析
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